A Great Many Pies

Time passed as it always did on the farm, slowly, with each minute taking a short eternity to tick by. Pinkie Pie settled into farm life relatively easily, though that was only possible due to the fact that she was regularly fucking both her mother and one of her sisters. This secret wasn't too hard to keep at first, as Limestone and Maud had their own nightly activities they wished to hide from their family.

It didn't stay that way for long though, as Pinkie Pie’s desires grew ever more insatiable, no matter how many times she indulged them. Then things really began to change when Maud and Cloudy Quartz left for their trip with a large wagon full of what they had managed to mine or cultivate. Selling their harvest was only the beginning though, as Maud was intent on checking out the local university and Cloudy Quartz wanted to take a detour as well but was cagey about the details.

Which meant there would be over a week where Limestone wouldn't have Maud, and Pinkie Pie wouldn't have Cloudy Quartz. Instead, the two futa mares had Marble as the only one capable of satiating both of their more base needs. Which meant the youngest Pie was left to content with a pair of well endowed siblings desperate to rut her at every opportunity.

It was a strange situation to say the least, as Limestone didn't know about the relationship Marble and Pinkie Pie had. Though Pinkie Pie and Marble knew of Limestone’s less than hidden desires for Marble’s generous posterior. Even if it was a strange situation, they made it all work, with Marble bouncing between her sisters, sucking and fucking them nearly constantly.

Things wouldn't remain that way forever though, and it wasn't long before things began to get a little more complicated.

Pinkie Pie grunted as her and her sister’s hips rested firmly against each other. The futa mare’s cock was buried in the other girl’s pussy and the party pony herself was in complete bliss. Sure she may have been laying on her back on the rocky earth, somewhere in the east field with only a foot of cover obscuring her from passerbies but that didn't really matter to Pinkie Pie though, as she had everything she wanted right there.

Marble shuddered as she slowly adapted to her sister’s mammoth length, and the way it twitched needfully inside of her. It hadn't been long since she had sucked Pinkie Pie off, so the young mare could still feel a heavy load of marecum sitting in her belly. Even still, Pinkie Pie was as hungry as ever, and had somehow convinced Marble to have sex in the middle of the field in broad day light.

Marble was just glad she had at least managed to find a long boulder to provide at least a little bit of protection.

“Thanks Marble.” Pinkie Pie whispered. “I really missed fucking you in the shower this morning.”

“S-sorry Pinkie Pie, but Limestone has started fucking me after she wakes up as well and enjoys using my pussy as a cock sleeve while she sleeps.” Marble whispered back, blushing profusely.

“Oh we have got to try that sometime soon.” Pinkie Pie declared.

Marble blushed even deeper. “Maybe tonight Pinkie Pie, but let's hurry before Lime-”

“Hey Marble, is that you back there?” Shouted a familiar voice.

Marble ducked beneath the long slim rock, and held a hoof against her sister’s lips while at the same time accidentally clenching down around the invader resting against the entrance to her womb. Marble’s tight grip combined with the position they were in meant that Pinkie Pie felt as though she was having her dick milked. It also made it very difficult to stay quiet, as the party pony wanted nothing more then to fuck her sister’s brains out.

“I saw you back here. Come on out! I just want to have a little fun.” Limestone barked, her hooves stopping a few feet away from the prone dou laying just out of sight. “Like ya know, as a break. I figured you deserved it given all the uh, great work you’ve been putting in.”

Pinkie Pie’s eyes rolled into the back of her head, and her cock twitched, alerting Marble to the fact that her sister was mere moments from orgasming. Marble, knowing full well that she wouldn't be able to keep herself from crying out should that happen desperately hoped Limestone would leave them alone.

And soon.

“Well if you are around here just come back to the house soon, thanks.” Limestone shouted before turning and trotting away.

Pinkie Pie came immediately, filling her sister to the point of bursting, and the two mares lay there panting for breath.

“That was weird.” Pinkie Pie exclaimed after the post orgasm bliss had finally began to dissipate.

“Yeah, Limestone is really starting to miss Maud.” Remarked Marble.

“I’m sure it will be fine. We only have a few more days left before mom and Maud are back.” Pinkie Pie pointed out.

“I hope your right Pinkie Pie.”

After that, things got predictably worse, with Marble getting passed between her sisters nearly constantly. Both of her well endowed siblings used the poor mare like their own personal cum dumps, fucking her several times a day without rest. Not like Marble was against this of course, she rather enjoyed the attention, but that didn't mean it didn't cause problems for the three mares.

Marble sat on the toilet, doing her best to push out the multiple loads Pinkie Pie had just fucked into her. With a grunt, she managed to push the last of the thick seed from inside of her, and sighed contentedly as she flushed it down the drain. She hardly even had a second to herself before the door opened and a flushed Limestone Pie stood in the doorway.

“I need you, now.” Stated the gruff mare, who kicked shut the door behind her.

Marble gulped. “R-right here?” She asked nervously.

“Yes, right here, right now, mouth or pussy, I don't care.” Limestone demanded.

“Well uh…” Marble paused, quickly realizing that her cunt was probably still stretched from the hours of abuse that Pinkie Pie had put it through over the course of the evening. “Mouth, I um, like how you taste.”

“Good, head down please.” Limestone half asked, half commanded.

Marble obeyed, lowering herself down and turning her head to the side. Limestone wasted no time trotting forward, and placing her cock against her sister’s lips. Once that was done, and Marble had begun taking the mare’s dick into her mouth, Limestone bucked her hips forward, shoving herself deep. The position was a little awkward, what with Marble half kneeling under her still standing sister, but they made it work.

“Sorry Marble. I need this.” Limestone apologized before using one hoof to hold Marble down while she throat fucked the shy mare.

Who could do little but take it, moaning around the massive invade inside of her throat and hoping her sister took her time.

Days went by much like that, with Pinkie and Marble’s antics only remaining undiscovered by Limestone because of just how horny the other mare was. Thankfully for Pinkie Pie, Limestone’s mind was clouded with lust and the usually sharp, observant pony was a little easier to fool. Even still, Marble couldn't help but think it was only a matter of time until they were discovered and on the last day before Cloudy Quarts and Maud’s return, it happened.

Marble stood on her mother’s bed, with her sister’s huge pink dick pounding into her pussy like a jackhammer. The results of three other orgasms already rested inside of the girl, either in her stomach, or her womb. Either way, the bulge Pinkie Pie’s cum made was large enough to slosh audibly, and be easily noticeable if anyone walked in.

Pinkie Pie was close to adding a fourth load, and was surprisingly quiet, having spent all her best compliments and teasing already and was content to enjoy the act itself without uttering a word. Marble didn't care either way, or at least that's what she told herself, as she rather enjoyed the gentle, and naughty teasing Pinkie Pie was known for. She didn't think of that right now though, all that existed was Pinkie Pie’s hot breath on her neck, and the distinct click of the mattress hitting the wall whenever the party pony thrusted.

“I’m close.” Pinkie Pie whispered.

“Give it to me.” Marble whispered back.

And then they both came, with Marble’s body somehow bloating even more than before. Pinkie Pie draped herself over her sister’s back, panting hard as her cock twitched and shot rope after rope into her sister’s body. They would have stayed this way for several more minutes, had the sound of hooves not come from the entrance to the room.

“Marble are you in there? You didn't get started without me did you?” Limestone called.

“Pinkie Pie, you locked the door right?” Marble asked.

Pinkie Pie shrugged. “I think so.”

The door clicked open, Marble shot Pinkie Pie a glare, and the pink pony laughed nervously.

“What is… oh. My. god.” Limestone muttered, her jaw hanging open as she stared at the two ponies. “I can't believe you two! On mother’s bed no less!”

“It's not what it looks like?” Pinkie Pie offered weakly the pony having started pulling out of Marble only to stop half way.

Limestone sighed and planted a hoof against her forehead. “I can't believe you two.”

“I’m sorry Marble.” Limestone murmured, hanging her head in shame.

The older mare snorted. “I don't care what you do with your body, but without a condom? Come on. Your both smarter than that.”

“Bwuh?” Pinkie Pie murmured.

Limestone rolled her eyes, trotted forward, and gently pushed Pinkie Pie off Marble, causing the pink pony to land on her butt at the edge of the bed. “Augh, and she finished inside of you as well.” Limestone muttered in disgust. “I know it's not quite heat season but it's coming up, and you can't be too careful.”

“Well I uh, really like how it feels?” Marble offered weakly, the pony sitting down at the edge of the bed only to slip and fall to the floor, landing on her butt. “Oof.”

“Oh come on, it's no big deal Limey.” Pinkie Pie retorted, the mare quickly hopping off the bed and trotting over to Marble, inadvertently revealing her cum covered cock to her younger sister.

“What would mother say if you knocked up your own sister huh?” Limestone retorted, jabbing Pinkie Pie in the chest. “You can't keep jumping into everything without thinking.”

Marble glanced over to Limestone, only to realize that she too was as hard as a rock, and that her cock was mere inches away. Due to the two mares arguing directly in front of her, Marble was bathed in the heavy scent of two aroused futa mares. While also getting a good view of their massive, throbbing erections that were within easy reaching distance.

“When I fuck mom I don't wear a rubber either and shes totally fine with it.” Pinkie Pie retorted, her now hard cock bumping against Marble’s left cheek.

“I can't believe you would do that! She is in a vulnerable place right now and you are taking advantage of her!” Limestone shouted, her cock brushing against Marble’s right cheek.

“I am not! Mom fantasized about me when she was still married to dad so there.” Pinkie Pie stuck her tongue out at her sister, which only made the other mare even more irate.

Marble however, had enough and reached out, grabbing both of the mare’s cocks in her hooves.

“What the-

“Hey, watch it!”

“I need you two to start using your heads, and not the ones in my hooves. Got it?” Marble declared.

Pinkie Pie gulped and nodded.

Limestone winced. “Alright, fine.”

Marble lessened her grip slightly, but didn't let go. “Now apologize to one another.”

“But I-”

“But she-”

“But nothing, do it right now.” Marble countered.

The two older ponies shared a sigh.

“I’m sorry Limestone.” Pinkie Pie murmured.

“I’m… sorry too Pinkie Pie.” Limestone whispered.

“Good.” Marble released her hold entirely. “Now I’m gonna need you two to fuck me like, right now please.”

“Don't you think-” Limestone began.

“Shotgun vagina!” Pinkie Pie shouted.

Limestone cursed under her breath. “Fine, I’ll take anal. I don't want your sloppy seconds anyway.”

“More like sloppy fourths.” Countered Pinkie Pie.

Limestone groaned even louder. “I’m already regretting this.”